CN103471925A - Detection apparatus for lithium ion battery housing laser welding strength, and use method thereof - Google Patents
Detection apparatus for lithium ion battery housing laser welding strength, and use method thereof Download PDFInfo
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- CN103471925A CN103471925A CN2013103368260A CN201310336826A CN103471925A CN 103471925 A CN103471925 A CN 103471925A CN 2013103368260 A CN2013103368260 A CN 2013103368260A CN 201310336826 A CN201310336826 A CN 201310336826A CN 103471925 A CN103471925 A CN 103471925A
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- 238000003466 welding Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 5
- 230000006698 induction Effects 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 201000001371 inclusion conjunctivitis Diseases 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 206010044325 trachoma Diseases 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Sealing Battery Cases Or Jackets (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention discloses a detection apparatus for lithium ion battery housing laser welding strength, and a use method thereof. The detection apparatus comprises an inflation module, a sensing control module and a standard clamper for fixing a sample battery requiring detection, wherein the inflation module comprises an air compressor, a gas storage tank and an inflation rod, the air compressor, the gas storage tank and the inflation rod are sequentially connected through pipelines, the end of the inflation rod is connected with an inflation nozzle, and the sensing control module comprises a gas pressure sensor arranged on the gas storage tank body, a light sensor for sensing emplacement of the battery, a processor, a controller and a transmission device. According to the present invention, a battery welded through laser welding is fixed in the specially made standard clamper meeting the battery size, and compressed gas is introduced into the battery housing through the gas introduction pipeline; and the apparatus has characteristics of simple operation steps, rapidness and strong practicality, the battery leakage situation during the battery use process due to not solid battery housing and cover plate welding can be substantially improved, and safety performance of the battery during the use process can be substantially increased.
Description
Technical field
The present invention relates generally to the lithium ion battery manufacturing technology, and especially battery case and cover plate laser weld strength detection method relate in particular to a kind of pick-up unit and using method thereof of casing of lithium ion battery laser weld strength.
Background technology
Along with the Global Oil resource is nervous, the air environmental pollution aggravation.The pure electric automobile of energy-conserving and environment-protective has been acknowledged as the main direction of 21 century automobile industry development.Each automobile vendor slowly turns one's attention to pure electric automobile and hybrid vehicle both at home and abroad.These trend will promote the develop rapidly of new-energy automobile industry greatly, and also production and the research and development for lithium ion battery provide good platform.The pure electric automobile most critical is partly battery module, and module is comprised of the cell connection in series-parallel.Monomer lithium ion battery just becomes the part of most critical.The performance quality of monomer lithium ion battery will directly affect the performance of whole battery module.Also will affect the normal operation of electric motor car.
In the lithium ion battery production run, after core winding into shell, battery case and battery cap seam crossing must be used the Laser Welding (LBW) firm welding.But, in laser beam welding, occasional occurs that the weld seam after the fried fiery phenomenon welding of welding has trachoma; Because the phenomenons such as rosin joint, weldering are leaked, weld strength is low often appear in the factors such as operation shakiness of weld jig wearing and tearing and laser-beam welding machine self.When follow-up the leaking hunting, out more screened than being easier to for the battery case of rosin joint solder skip, but can't screen and choose weld seam trachoma and the low battery case of weld strength.
The leakage battery is carried out to statistical study, and the one of the main reasons that causes battery leakage is that the battery container weld strength is inadequate.Whether if only to the battery after welding, use the detection of negative pressure battery to leak gas, and the lower battery of weld strength can not be detected, the lower battery of weld strength, after subsequent handling fluid injection sealing, is taken as the direct entrucking of qualified battery and uses.After this underproof battery is by entrucking, in the electric motor car operational process, must bear vibration repeatedly, the battery case of not prison welding can be bursting at the collision because bearing certain pressure or shock, and the electrolytic solution in battery container spills outward., except the performance of poor-performing affects whole Battery pack group, also there is larger potential safety hazard in the battery of leakage.Once the electrolytic solution in battery flows out meeting and airborne moisture generation chemical reaction in battery container, not only the performance of battery can directly be affected, and the electrolytic solution meeting corrosion cell group casing of outflow, also can cause environmental pollution simultaneously.
Domestic existing battery manufacture enterprise, a company can not guarantee that the weld strength 100% of all battery finished product battery cores reaches the lower limit of the technological requirement of the said firm self at present.How effectively guaranteeing the consistance of finished product battery core weld strength, will be the unavoidable problem that battery manufacture enterprise need to further investigate.
Summary of the invention
The object of the invention is to for the underproof battery case of Laser Welding (LBW) weld strength, propose the detection method of a kind of optimization, practicality, easy row.
The present invention is achieved by the following technical solutions:
A kind of pick-up unit of casing of lithium ion battery laser weld strength and using method thereof, include pick-up unit, and described pick-up unit includes: inflator module, induction control module and for the fixing standard fixture of detected sample battery; Described inflator module includes air compressor, gas-holder, the inflation bar connected by pipeline successively, inflation bar end is connected with charging connector, pipeline place, gas-holder gas outlet is provided with pressure loading valve, pressure loading valve one side is provided with tensimeter one, pressure loading valve with the inflation bar between pipeline be connected a valve, valve gas outlet one side is provided with tensimeter two;
Described induction control module includes the baroceptor one be located on tank body of air storage tank, the baroceptor two of being located at tensimeter 21 sides, also includes controller one, controller two; The signal output part of described baroceptor one is connected with controller one signal input part, controller one control linkage air compressor; Described induction control module also includes the light sensor in place for the sensing battery one and light sensor two, and processor and gearing, described light sensor one is located at charging connector one side, the signal input part of described light sensor one signal output part and controller two joins, controller two and valve control linkage, described light sensor two is located at fixture one side, the signal output part access gearing signal input part of described light sensor two; Described baroceptor binary signal output terminal access processor signal input end, described processor control linkage gearing; Described inflation bar is fixed on gearing; Described processor signal output terminal also is connected with alarm lamp.
Described pick-up unit can connect 6 ~ 8 parallel detection systems.
Battery after Laser Welding (LBW) welding is fixed in the special standard fixture that meets battery size, and pressure gas passes in battery case by breather line.By constantly pressurization, a certain amount of pressure gas is pressed in battery case.When pressure reaches weld strength technological requirement standard, keep the corresponding time.The weld seam of battery case and cover plate welding insufficient strength is bursting at the collision under this pressure, then, by battery is leaked hunting, the battery that in last operation Laser Welding (LBW) welding process, battery case and top cover weld strength are inadequate is screened out.
Its detection method concrete operation step is as follows:
I) start, air compressor is started working, air compressor is stored in compressed gas in gas-holder, air pressure inductor one is transferred to controller one by air pressure signal, set a preset pressure value P1, when pressure reaches preset value P1, controller one is to a control signal of air compressor output, and air compressor quits work; If gas-holder internal pressure value P2 is lower than preset value (P2<P1), controller one is to a control signal of air compressor output, air compressor start work; Wherein tensimeter one monitoring reduction valve outlet side gaseous tension, reduce to needed convenient pressure by compression pressure.
II) take one of them detection system as example, the detected sample battery is put between standard fixture, the light sensor two of fixture one side is sensed signal of battery rear output in place to gearing, and gearing drives the inflation bar and automatically falls together with charging connector, until aim at the battery liquid-filling hole.
III) decline of inflation bar puts in place, by light sensor one, is responded to, and light sensor one is transferred to 21 signals of controller, a control signal of controller two way valve door output, and valve open, system starts to fill compressed gas to inside battery.
IV) set a pressure value P 3 according to welding battery intensity detection criterion of acceptability; Tensimeter two is located between valve and inflation bar, and for pressing in monitoring battery, establishing monitor value is P4.
V) as inner pressure of battery P4=P3, air pressure inductor two sends a signal to processor, and the processor by-pass valve control is closed, and inflation stops, and starts timing while maintaining regular hour T1(from P4=P3); T1 time internal pressure is constant, and processor just sends a signal to gearing, and gearing drives the inflation bar and automatically rises, and this battery is qualified through pressure detection.
VI) set a time value T2, if inner pressure of battery P4 starts timing at T2(from light sensor one is sensed signal, and T2 is greater than T1) do not reach the P3 value in the time, can judge this battery gas leakage, processor sends the alarm lamp of a signal to this battery place station, the alarm lamp flicker, prompting gas leakage.Now, manual cocked gearing CB, inflation bar CC rises, and takes out battery and goes to last operation, uses the laser bonding mending-leakage.
VII) wherein, when the inflation bar is raised (containing automatically rising and manually rise two kinds of situations), the non-inductive signal of light sensor one, will respond to consequential signal and be transferred to controller two, and controller two by-pass valve controls are closed, and inflation stops.
Advantage of the present invention is:
Apparatus of the present invention operation steps is simple, quick, practical, and battery container and cover plate not prison welding and battery leakage situation in the battery use procedure that causes will be improved greatly, and battery security performance is in use significantly promoted.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is operational flowchart of the present invention.
Embodiment
As shown in Figure 1, a kind of pick-up unit of casing of lithium ion battery laser weld strength and using method thereof, include pick-up unit, and described pick-up unit includes: inflator module, induction control module and for the fixing standard fixture 6 of detected sample battery; Described inflator module includes air compressor 1, gas-holder 2, the inflation bar 5 connected by pipeline successively, inflation bar end is connected with charging connector 18, gas-holder 2 pipeline places, gas outlet are provided with pressure loading valve 3, pressure loading valve 3 one sides are provided with tensimeter 1,5 pipelines of pressure loading valve 3 and inflation bar are connected a valve 4, and valve 4 one sides are provided with tensimeter 2 14;
Described induction control module includes the baroceptor 1 that is located on gas-holder 2 tank bodies, is located at the baroceptor 2 10 on tensimeter 2 14, also includes controller 1, controller 2 17; The signal output part of described baroceptor 1 is connected with controller one 16 signal input parts, controller one 16 control linkage air compressor 1; Described induction control module also includes the light sensor in place for the sensing battery 1 and light sensor 2 12, and processor 7 and gearing 8, described light sensor 1 is located at charging connector 18 1 sides, the signal input part of described light sensor one 11 signal output parts and controller 2 17 joins, controller 2 17 and valve 4 control linkages, described light sensor 2 12 is located at fixture 6 one sides, signal output part access gearing 8 signal input parts of described light sensor 2 12; Described baroceptor 2 12 signal output part access processor 7 signal input parts, described processor 7 control linkage gearings 8; Described inflation bar 5 is fixed on gearing 8; Described processor 7 signal output parts also are connected with alarm lamp 15.
Described pick-up unit can connect 6 ~ 8 parallel detection systems.
A kind of pick-up unit of casing of lithium ion battery laser weld strength, its detection method concrete operation step is as follows:
I) start, air compressor 1 is started working, air compressor 1 is stored in compressed gas in gas-holder 2, air pressure inductor 1 is transferred to controller 1 by air pressure signal, set a preset pressure value P1, when pressure reaches preset value P1, controller 1 is to a control signal of air compressor 1 output, and air compressor 1 quits work; If gas-holder 2 internal pressure value P2 are lower than preset value (P2<P1), controller 1 is to a control signal of air compressor 1 output, air compressor 1 start work; Wherein tensimeter one 13 monitoring reduction valve 3 outlet side gaseous tensions, reduce to needed convenient pressure by compression pressure.
II) take one of them detection system as example, the detected sample battery is put into to 6 of standard fixtures, the light sensor 2 12 of standard fixture 6 one sides is sensed signal of battery rear output in place to gearing 8, gearing 8 drives inflation bar 5 and automatically falls together with charging connector 18, until aim at the battery liquid-filling hole.
III) 5 declines of inflation bar put in place, and by light sensor one 11 inductions, light sensor 1 is transferred to 2 17 1 signals of controller, and controller 2 17 is to a control signal of valve 4 outputs, and valve 4 is opened, and system starts to fill compressed gas to inside battery.
IV) set a pressure value P 3 according to welding battery intensity detection criterion of acceptability; Tensimeter 2 14 is located between valve 4 and inflation bar 5, and for pressing in monitoring battery, establishing monitor value is P4.
V) as inner pressure of battery P4=P3, air pressure inductor 2 10 sends a signal to processor 7, and processor 7 by-pass valve controls 4 are closed, and inflation stops, and starts timing while maintaining regular hour T1(from P4=P3); T1 time internal pressure is constant, and processor 7 just sends a signal to gearing 8, and gearing 8 drives inflation bar 5 and automatically rises, and this battery is qualified through pressure detection.
VI) set a time value T2, if inner pressure of battery P4 starts timing at T2(from light sensor 1 is sensed signal, and T2 is greater than T1) do not reach the P3 value in the time, can judge this battery gas leakage, processor 7 sends the alarm lamp 15 of a signal to this battery place station, alarm lamp 15 flickers, prompting gas leakage.Now, manual cocked gearing 8, inflation bar 5 rises, and takes out battery and goes to last operation, uses the laser bonding mending-leakage.
VII) wherein, when inflation bar 5 is raised (containing automatically rising and manually rise two kinds of situations), the non-inductive signal of light sensor 1, will respond to consequential signal and be transferred to controller 2 17, and controller 2 17 by-pass valve controls 4 are closed, and inflation stops.
Embodiment 1
Get aluminium matter cubic battery, battery case wall thickness: 0.5mm.The volume heart after concora crush encapsulate is put into to aluminium matter cubic battery, and battery carries out the pole welding.Battery after the pole welding proceeds to down the laser bonding operation one, the length limit of top cover and battery container seam crossing is welded.Battery after welding will proceed to the Laser Welding (LBW) weld strength and detect operation.Battery is clamped with standard fixture, and be fixed on pick-up unit.Start is detected.Laser weld strength proceeds to down the operation of leaking hunting together after detecting.Add up the underproof number of batteries of weld seam simultaneously.Proceed at battery the leakage situation that fluid injection forming and capacity dividing operation continues to follow the tracks of statistics finished product battery commissure later.
Get aluminium matter cubic battery, battery case wall thickness: 0.7mm.The volume heart after concora crush encapsulate is put into to aluminium matter cubic battery, and battery carries out the pole welding.Battery after the pole welding proceeds to down the laser bonding operation one, the length limit of top cover and battery container seam crossing is welded.Battery after welding will proceed to the Laser Welding (LBW) weld strength and detect operation.Battery is clamped with standard fixture, and be fixed on pick-up unit.Start is detected.Laser weld strength proceeds to down the operation of leaking hunting together after detecting.Add up the underproof number of batteries of weld seam simultaneously.Proceed at battery the leakage situation that fluid injection forming and capacity dividing operation continues to follow the tracks of statistics finished product battery commissure later.
Get aluminium matter cubic battery, battery case wall thickness: 1mm.The volume heart after concora crush encapsulate is put into to aluminium matter cubic battery, and battery carries out the pole welding.Battery after the pole welding proceeds to down the laser bonding operation one, the length limit of top cover and battery container seam crossing is welded.Battery after welding will proceed to the Laser Welding (LBW) weld strength and detect operation.Battery is clamped with standard fixture, and be fixed on pick-up unit.Start is detected.Laser weld strength proceeds to down the operation of leaking hunting together after detecting.Add up the underproof number of batteries of weld seam simultaneously.Proceed at battery the leakage situation that fluid injection forming and capacity dividing operation continues to follow the tracks of statistics finished product battery commissure later.
Claims (3)
1. the pick-up unit of a casing of lithium ion battery laser weld strength and using method thereof, include pick-up unit, it is characterized in that: described pick-up unit includes: inflator module, induction control module and for the fixing standard fixture of detected sample battery; Described inflator module includes air compressor, gas-holder, the inflation bar connected by pipeline successively, inflation bar end is connected with charging connector, pipeline place, gas-holder gas outlet is provided with pressure loading valve, pressure loading valve one side is provided with tensimeter one, pressure loading valve with the inflation bar between pipeline be connected a valve, valve gas outlet one side is provided with tensimeter two;
Described induction control module includes the baroceptor one be located on tank body of air storage tank, the baroceptor two of being located at tensimeter 21 sides, also includes controller one, controller two; The signal output part of described baroceptor one is connected with controller one signal input part, controller one control linkage air compressor; Described induction control module also includes the light sensor in place for the sensing battery one and light sensor two, and processor and gearing, described light sensor one is located at charging connector one side, the signal input part of described light sensor one signal output part and controller two joins, controller two and valve control linkage, described light sensor two is located at fixture one side, the signal output part access gearing signal input part of described light sensor two; Described baroceptor binary signal output terminal access processor signal input end, described processor control linkage gearing; Described inflation bar is fixed on gearing; Described processor signal output terminal also is connected with alarm lamp.
2. the pick-up unit of a kind of casing of lithium ion battery laser weld strength according to claim 1 and using method thereof, it is characterized in that: described pick-up unit can connect 6 ~ 8 parallel detection systems.
3. the pick-up unit based on a kind of casing of lithium ion battery laser weld strength claimed in claim 1, its detection method concrete operation step is as follows:
I) start, air compressor is started working, air compressor is stored in compressed gas in gas-holder, air pressure inductor one is transferred to controller one by air pressure signal, set a preset pressure value P1, when pressure reaches preset value P1, controller one is to a control signal of air compressor output, and air compressor quits work; If gas-holder internal pressure value P2 is lower than preset value (P2<P1), controller one is to a control signal of air compressor output, air compressor start work; Wherein tensimeter one monitoring reduction valve outlet side gaseous tension, reduce to needed convenient pressure by compression pressure;
II) take one of them detection system as example, the detected sample battery is put between standard fixture, the light sensor two of fixture one side is sensed signal of battery rear output in place to gearing, and gearing drives the inflation bar and automatically falls together with charging connector, until aim at the battery liquid-filling hole;
III) decline of inflation bar puts in place, by light sensor one, is responded to, and light sensor one is transferred to 21 signals of controller, a control signal of controller two way valve door output, and valve open, system starts to fill compressed gas to inside battery;
IV) set a pressure value P 3 according to welding battery intensity detection criterion of acceptability; Tensimeter two is located between valve and inflation bar, and for pressing in monitoring battery, establishing monitor value is P4;
V) as inner pressure of battery P4=P3, air pressure inductor two sends a signal to processor, and the processor by-pass valve control is closed, and inflation stops, and starts timing while maintaining regular hour T1(from P4=P3); T1 time internal pressure is constant, and processor just sends a signal to gearing, and gearing drives the inflation bar and automatically rises, and this battery is qualified through pressure detection;
VI) set a time value T2, if inner pressure of battery P4 starts timing at T2(from light sensor one is sensed signal, and T2 is greater than T1) do not reach the P3 value in the time, can judge this battery gas leakage, processor sends the alarm lamp of a signal to this battery place station, the alarm lamp flicker, prompting gas leakage; Now, manual cocked gearing CB, inflation bar CC rises, and takes out battery and goes to last operation, uses the laser bonding mending-leakage;
VII) wherein, when the inflation bar is raised (containing automatically rising and manually rise two kinds of situations), the non-inductive signal of light sensor one, will respond to consequential signal and be transferred to controller two, and controller two by-pass valve controls are closed, and inflation stops.
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| CN106198238A (en) * | 2016-09-06 | 2016-12-07 | 珠海银隆新能源有限公司 | Burst disk pressure resistant testing device |
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| CN107664605A (en) * | 2017-09-13 | 2018-02-06 | 莱茵技术-商检（宁波）有限公司 | A kind of detection device of lithium battery pack shell |
| CN113953663A (en) * | 2021-10-21 | 2022-01-21 | 武汉锐科光纤激光技术股份有限公司 | Laser welding monitoring devices and laser welding system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106198238A (en) * | 2016-09-06 | 2016-12-07 | 珠海银隆新能源有限公司 | Burst disk pressure resistant testing device |
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| CN107664605A (en) * | 2017-09-13 | 2018-02-06 | 莱茵技术-商检（宁波）有限公司 | A kind of detection device of lithium battery pack shell |
| CN113953663A (en) * | 2021-10-21 | 2022-01-21 | 武汉锐科光纤激光技术股份有限公司 | Laser welding monitoring devices and laser welding system |
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| CN103471925B (en) | 2016-05-11 |
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